CY(4) NetBSD Kernel Interfaces Manual CY(4)
NAMEcy -- Cyclades Cyclom-{4, 8, 16, 32}Y asynchronous comms board serial
device driver
SYNOPSIScy0 at isa? iomem 0xd4000 irq 12cy* at pci? dev ? function ?DESCRIPTION
This driver provides an interface to Cyclades Cyclom-4Y, Cyclom-8Y,
Cyclom-16Y, and Cyclom-32Y asynchronous multiport serial boards. These
boards are based around Cirrus Logic CD1400 communication controllers.
The device minor numbers for this driver are encoded as follows:
d c c p p p p p - bits in the minor device number
bits meaning
---- -------
ppppp physical serial line (i.e. port) to use:
0-3 on Cyclom-4Y
0-7 on Cyclom-8Y
0-15 on Cyclom-16Y
0-31 on Cyclom-32Y
cc card unit number; note this limits the driver to
four cards per system
d set to use as a dial-out line
FLOW CONTROL
The cy driver makes use of the CD1400's automatic CTS flow control. In
addition, the CD1400's automatic input flow control can be used. This
requires the kernel configuration option CY_HW_RTS and a special cable
that exchanges the RTS and DTR lines.
DIAGNOSTICScy%d: port %d: can't allocate tty There is not enough memory to allocate
tty data structures.
cy%d: can't allocate input buffer There is not enough memory to allocate
the data input buffer.
Additional debugging output can be enable with the kernel configuration
option CY_DEBUG. Diagnostic counters may be enabled with the kernel con-
figuration option CY_DEBUG1.
SEE ALSOtermios(4), tty(4)AUTHORS
The cy driver was written by Timmo Rossi.
BUGS
Support for the Cyclom-32Y has not been tested.
NetBSD 5.1 November 10, 1997 NetBSD 5.1

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